Tetra Whisper Air Pump for Aquariums 20 to 40 Gallons, Quiet Powerful Airflow, UL Listed

Love the quietness of this pump. Puts out great air flow. Have had these brand of pumps for 20 years and they are that good ole reliable pump as ever

I honestly thought it was broken when I first plugged it in. When they say whisper quiet, they mean it. Even though it makes almost no noise, it puts out a powerful jet of air. I have two under gravel filters and a large circle bubbler attached to the one pump and have to use values to cut down the air flow so there isn't too much turbulence for the fish. Having been a science teacher, I've gone through a lot of pumps and this one is far superior to any other that I've had . The low cost almost scared me away. I thought any pump that inexpensive would be junk. Boy was I wrong! It's a great little pump and I'm sure glad i took the chance on it.